Incandescent burner



No. 620,338. a Patanted Feb. 28, 1899. J. B. DE LEBY.

INGANDESGENT BURNER.

(Apphcahon filed Jan 24 1898 (No Model.)

WITNESSES: %M .W 4%

n: nunms mzns coy. momuwoqwasnmumu n c UNITED STATES PATENT 7 OFFICE.

JOSEPH B. DE LERY, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGN- MENTS,TO THE DE LERY LIGHT COMPANY, OF NE\V JERSEY.

INCANDES CENT BURNER.

SPECIFICATION forming part of Letters Patent No. 620,338, dated February28, 1899.

Application filed January 24, 1898. Serial No. 667,686. (No model.) I

To all whom it'may concern: I

Be it known that I, JOSEPH B. DE LERY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in IncandescentBurners, of which the following is a full, clear, and exact description.

This invention relates to lighting by incandescence from gas and vapor;and it consists of an improved burner whereby great 6flIlciencyisattained and the replacing of injured portions of the incandescing bodymay be accomplished without the necessity of renewing the entireincandescing element.

The invention also includes certain details of construction relating tothe means for supporting the incandescent material, all of which will befully described hereinafter,with reference to the accompanying drawings,in which Figure 1 is a perspective view of the complete burner. Fig. 2is a side elevation with parts broken away, and Fig. 3 shows modifiedforms of thimbles used in supporting the incandescing material.

' In United States Patent No. 583,187, issued to me May 25, 1897, isdescribed a burner in which the incandescing material is in the form ofa continuous tufted ring made up of layers of incandescin g materialbunched and pressed together at their upper edges, leaving the loweredges free and more or less separated to permit the heat of the flame toenter. The gas-outlets are in a drum of smaller diameter than the ringof incandescent material, and the flames projecting from the sidesthereof impinge against the lower edges of the ring. I have learned thatwhile all the benefits of the mutual support of the layers of theincandescent material are obtained by this construction there stillremains an obstacle to the highest state of incandescence, which is thefact that the tufts are so crowded together that there is not sufficientfreedom for the circulation of air around about those portions of theburner which furnish the incandescence. By retaining this ring-likeshape and separating the tufts or bunches so as to provide a freeair-space between the adjacent tufts I obtain a much higher grade ofincandescence.

In an application for patent filed by me October 14, 1897, seriallynumbered 655,167, I have described a particular form of tuft and statedthat such tuft might be used singly or with others bunched together; butin this case the means for conveniently supporting and replacing thesingle tuft was not set forth. In the present case I propose to describewhat I now believe to be the most practical and eflicient form of burnerof this class that can be devised, and while the difference ofconstruction over the two cases above referred to are not great, yetthose difierences, such as they are, afford distinctly advantageousresults, which lend to them considerable importance from a patentablestandpoint.

- The frame upon which the incandescent bodies are supported consists ofa central hub 04, from which radiate a series of arms or spokes b, onthe outer ends of which the tuft-s of incandescent material are hung.The gas or vapor flows from openings in a drum arranged concentricallybelow the support for the tufts and is of a less diameter than the ringof tufts, so that it will not cut off the rays of light. Thecircumferential distance between the extremities of the arms b is suchas to-afiord an open space for the circulation of air around each tuft,and since the entire lower portions of the tufts are thereby brought mahigh state of incandescence the spaces between the tufts when the burneris inoperation become obliterated and the burner has the appearance of acontinuous ring of light. 4

To facilitate the removal and adjustment of the tufts upon the support,each tuft is saddled over a spool or thimble c and bound around the sameto form together an individual structure. Then to adjust the tuft to theend of an arm I) it is simply slipped over the same and may be removedby as simple an operation. To prevent the tufts from being shaken off ofthe support, the end of the arm I) is provided with a recess or seat I)for the spool and a cross-head or detent b When the spool is slippedover the end of the arm, it drops down behind the detent and will notcome off unless it is lifted to clear the detent. Modified forms of thespool are shown in Fig. 3, wherein the opening through the spool isoblong or formed with two parallel sides adapted to fit over a fiat armI), thus preventing slight rotation of the spool on the arm and sokeeping the tuft steady. Other means, of course, may be provided forsupporting the tufts upon the arms; but the means described arepreferred on account of their simplicity and convenience.

The gas-drum, from which the heat-flames project, is shown at d and thegas-outlets at cl. This drum is of less diameter than the ring of tufts,so as not to obstruct the light therefrom. The row of gas-outlets is inthe right plane to direct the flames into the open ends of the tufts.

This burner is admirably adapted for streetlighting on account of itsability to resist shocks and jars without breakage. It may, however, beused wherever illumination is required and may always be used without achimney. In case a tuft is injured the burner obviously is not rendereduseless, for those remaining will continue to furnish light; but aninjured tuft may be replaced by a good one without interfering with theothers, and this is an important advantage of the invention, for in theburner of the patent hereinbefore referred to and in the burner of theapplication referred to while it is possible to separate an injured tuftfrom the others it cannot be done without the greatest care andsometimes cannot be done at all, because after burning awhile mantles incontact with each other are likely to become Welded together. Aplurality of tufts separately and independently supported upon theextremities of a plurality of radial arms, in combination withgasoutlets arranged concentrically, but in side of the ring of tufts,possesses advantages over the other forms of burner herein referred to.

It will be understood that the tufts of incandescent material hereinreferred to are preferably those of the character described in thepatent and the application referred tothat is to say, they are made ofthe usual fragile layers or sheets folded or placed together in such aWay as to bring them into supporting contact with each other at oneedge, while they are separated at the other edge to admit the heat ofthe flame.

I am aware that pencils and other solid tial interval between them, aplurality of incandescin g tassels each consisting of a number of layersof fragile mineral fabric bunched at the top and free at the bottom, andsaid tassels suspended from said supports with a substantial air-spacebetween them, and a burner provided with a perforate head adjacent tothe free edges of said layers, whereby the flame enters within saidlayers and into the space between said tassels, substantially as and forthe purpose described.

2. The combination in incandescent gasburners of a standard providedwith a plurality of supports for incandescent elements arranged with asubstantial interval between said supports and each provided with a seatand detent, a plurality of incandescing tassels each'consisting oflayers of fragile mineral fabric as described and provided with a spooladapted to have a removable fit on said supports, from which saidtassels are suspended with a substantial air-space between them, and aburner provided with a multiperforate head adjacent to saidtassels,whereby the flame enters the folds of the tassels and also theair-space between them, substantially as and for the purpose-described.

3. In an incandescent gas-burner and in combination with a suitablesupport, an incandescing tassel composed of a plurality of layers offragile mineral fabric and a thimble around which said layers aresecured, and said thimble being adapted to a removable fit on saidsupport, substantially as described.

In witness whereof I subscribe my signature in presence of twowitnesses.

JOSEPH 13. DE LERY. Witnesses:

WM. A. ROSENBAUM, HARRY BAILEY.

